Seven patients suffering from Meniere's disease and undergoing retrosigmoid vestibular neurectomy were exposed to the mobile phone placed over the craniotomy area for 5 minutes. Five patients undergoing the same surgical procedure served as control group.
Exposure duration: continuous for 5 min (active call)
|Exposure duration||continuous for 5 min (active call)|
All patients showed a substantial significant decrease in amplitude and a significant increase in latency of cochlear nerve compound action potentials during the 5 min of exposure to the electromagnetic field. These changes lasted for a period of around 5 min after exposure. The analysis of the acoustic evoked brainstem potentials performed on wave V showed no statistically significant differences related to the electromagnetic field exposure. Postoperative audiological follow-up revealed no significant hearing threshold deterioration in any of the patients.